@dzagro. Seem like there a lot of you PHPbb users looking to come to Vanilla. That's great. To find out how to do an import, I would start with the "documentation", you can find that at the top of the page. Or you can read this thread:

That shows another user doing the same thing. In the future, you should start a separate topic for a new question and only after you have done some research. We are a friendly bunch here, but it's expected that you do a bit of research before asking a question first